One thing immediately leaps out at me - you are using a very old version of
Open MPI. I suspect Tim is testing on a much newer version, most likely the
1.2 version that is about to be released in the next day or two.

If it's at all possible, I would urge you to upgrade to 1.2 - if you would
rather not wait for the official release, the web site's latest beta is
virtually identical. I believe you will find the code much improved and
worth the change.

If you truly want to stick with the 1.1 family, then I would suggest you at
least update to the latest release there (we are currently at 1.1.4, and
1.1.5 - which is planned to be the last in that series - is also coming out
in the next day or two).